Door-control mechanism.



C. .C. TOMKINSON.

DOOR CONTROL MECHANISM,

APPLICATION FILED MAY 3.19125.

Patented Aug. 27, 1918* '2 SHEETS-SHEEI l.

54454 5% $4; whim C. C. TOIVIKINSON.

DOOR CONTROL MECHANISM. APPLICATION FILED MAY 3,19%. 1 276 996 Patented Aug. 27, 1918.

2 SHEETS-SHEEI 2.

CHARLES C. TOMKINSOIN, OF 'PLAINFIELD, NEW JERSEY, ASSIGNOB, TC GEORGE E. FBOTHINGHAT/I COMPANY, OF NEV] YORK, N. Y., A CORPORATION OF NEW' YORK.

DOORCONTROL MECHANISM...

Specification of Letters Patent.

Patented Aug. 2'7, 1918.

Application filed may 3, 1916. Serial No. 95,286.

sow, a citizen of the United States, and a resident of Plainfield, Union county, and

State of New Jersey, have invented certain new and useful Improvements in Door- Control'Mechanism, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to doors and has special reference to such as have their lower corners raised vertically and of which the upper corners are adapted to swing away from the door opening on tracks or guideways which are horizontal or at a suitable angle to the plane of the door opening.

One object of my invention is to provide means for forcing-the respective sides oi. the door at the points of support to move at i the same speed, or, in other words. to main tam a parallel relation between the plvotal axis of the door and the plane of the door opening at all times.

Other objects and advantages of my iiivention will be set forth hereinafter, and in order that my invention may be thoroughly understood 1 will now proceed to describe the same in the following specification and then point out the novel features thereof in appended claims.

teferring to the drawings:

Figure 1 is a partially diagrammatic sectional elevation of a door arranged and eon structcd in accordance with my invention.

Fig. :2 is a partial plan view of the door in its openposition with the guard rail removed.

A modified arrangement is shown in Fig.

3 which corresponds to Fig. 1.

Still other modifications are shown in Figs. 4 and 5 which are plan views showing the.doors in their open position, their closed positions being indicated by broken lines.

Referring to Figs. 1 and 2,- designates a door having afiixed to it near its upper corners a pair of brackets 11 which constitute bearings for a transverse shaft 1:2.

Secured to the shaft at its respective ends are a pair of toothed or spiked Wheels 13 which are adapted to cooperate with stationary guide rails 14. The rails may be perforated as shown in Fig. 2, or may have the form of racks, or otherwise be adapted to cooperate with the wheels and prevent the slipping of the wheels 13 thereon.

Since the wheels are bothsecured to the same shaft and are substantially alike, they obviously travel at the same speed and the top of the door is maintained parallel to the plane of the door opening at all times.

In order to prevent the wheels from be ing accidentally lifted oif the rails 1%, a guard rail 15 is mounted directly above and parallel to each of the rails 14, preferably over the hubs 13 of the wheels 13, suiiicient space being allowed to permit the free movement of the-wheel.

Rollers 16 are preferably located near the bottom of the door at its respective edges and stationary guide members 17 are mounted on .the door posts to cooperate \vith'the rollers.

Hoisting chains 18 extend upwardly from the bottom of the door over sheaves 19 to a counterweight 20.

The door is preferably provided with a handle 21 located near its bottom edge which may be grasped to swing the door open and closed.

In the arrangement. of Fig. .3, a pair of smooth rimmed wheels are substituted for the toothed wheels 13 and run on smooth rails :26. The rollers or wheels may be mounted directly on the brackets 11 since it is unnecessary that the two wheels be tied together as in the previous arrangement. Mounted slightly beyond the outer limit of movement for the top of the door is :vshaft 27 substantially equal in length to the width of the door and having secured to its respective ends sprocket wheels or pocket sheaves 28. These wheels or sheaves are connected by endless chains 29 to idler sheaves 30 which are mounted on brackets 31, above the door opening with their common axis substantially in the plane of the same.

The chains 29 are connected to the brackets 11 and hence the edges of the door 10 to which the brackets are secured are forced to move at the same speed in opening or closing. This is evident from the fact that the chains cannot slip on the pulleys Q8 and the pulleys :28 are both secured to the same shaft 27. The arrangement of Fig. l comprises track rails 26 and wheels as in Fig. 3, but instead of the sprocket wheels or pocket sheaves there are nlurelit of idle' A o w le s 32 to 31 inclusive. .lhe pulleys are ed on station-er"; oreslze and 39 and re located near til outer of the track rails 26. The pulleys are grouped near the inner end or one of the EZtllS and the pulleys 35 and 36 the inner end the other Hill.

A chain or e0 to the and extends s2, 35 some point; it is also seen pulleys and by it .e

top of the door near opposi the fastener lO inoves :troin or tne door opening, it pulls on necessarily exerted upon tile c i v 0 ll. Coin rsely an; 'pnll exe ted o tenor the fastener ll acts through tne direction of the arrow l3 and on the fastener J hns s are necessari lmtorm o e "00 d the p till 5 main ned in parallelism to the plane of the door or ening.

By any of bility of bin edges is er le 1 and manipulation lezy tongs links 1% and at ll and he inner end-oi the n to a stationary 51 above the p end orthe link zit-the top by diiicntions of my invention Wll selves to those skilled in th' "nd that-only such limitation posed indicated in sppe de Tim 1 I claim is: 7

he combination with a door having r corners guided to more in e glane i the door opening and with its er corners adapted to swing away from door opening at the top hoisting mechun'stn conne ted to the door, stationary 9 mem in the plane of the door opene lower corners of the door, track p of the door and located near edges,- rollers secured to the vinon axis and cooperating with "ineens for causing the respecer corners of the door to travel out the same speed whereby the axis maintained in parallel reward movement of said corners.

2. e combination with a door having its er corners adapted to be moved in s 'ol parallel with the door opening and upper corners adapted to swing plane or the door open ng lt'S re n tl e f guide rails extending at zin' L to c p ane of the door opening, rollers on the door adopted to cooperate with t n and e pair of endless chains :1 iide rails and connected J. EL k} sin, and the pocket sheaves secured, nivotnl 5 or the door 18 maintained ending in the direction of move- ,1

is the lower edges of the .door dur- Wherei el relation to the plane of the door r 

